/// <summary> Ensures that the corresponding element source is loaded. </summary>
private void EnsureElementSource(Vector2d point)
{
var boundingBox = _tileController.GetTile(point).BoundingBox;
var elementSource = _elementSourceProvider.Get(boundingBox)
.SingleOrDefault(e => !e.IsReadOnly).Wait();
// create in memory element source
if (elementSource == null)
{
// NOTE use bounding box which fits whole world
var indexBuilder = new InMemoryIndexBuilder(new BoundingBox(
new GeoCoordinate(-90, -180), new GeoCoordinate(90, 180)),
IndexSettings.CreateDefault(), _objectPool, Trace);
indexBuilder.Build();
elementSource = new ElementSource(indexBuilder)
{
IsReadOnly = false
};
_elementSourceProvider.Add(elementSource);
}
CommitIfNecessary(elementSource);
_currentElementSource = elementSource;
_elementSourceEditor.ElementSource = _currentElementSource;
}
